Ship's Frame Structures

 In ships, frames are ribs that are transverse bolted or welded to the keel. Frames support the hull and give the ship its shape and strength.

In wooden shipbuilding, each frame is composed of several sections, so that the grain of the wood can follow the curve of the frame. Starting from the keel, these are the floor (which crosses the keel and joins the frame to the keel), the first futtock, the second futtock, the top timber, and the rail stanchion.[1] In steel shipbuilding, the entire frame can be formed in one piece by riveting or welding sections; in this case the floor remains a separate piece, joining the frame on each side to the keel.

Frame numbers are the numerical values given to the frames; they begin at 1 with the forward-most frame, and numbers increase sequentially towards the stern. The total number vary per the length of a ship. Frame numbers tell you where you are in relation to the bow of the ship; the numbers increase as you go aft.[2]

The frames support lengthwise members which run parallel to the keel, from the bow to the stern; these may variously be called stringers, strakes, or clamps.[3] The clamp supports the transverse deck beams, on which the deck is laid.

Construction of ships and other floating vessels.

 

Shipbuilding is the construction of ships and other floating vessels. It normally takes place in a specialized facility known as a shipyard. Shipbuilders, also called shipwrights, follow a specialized occupation that traces its roots to before recorded history.

Shipbuilding and ship repairs, both commercial and military, are referred to as "naval engineering". The construction of boats is a similar activity called boat building.

The dismantling of ships is called ship breaking.

What is Ship's Hull?

 A hull is that part of ship that extends below the waterline to cover and protect water from getting in. You can consider it as the shell which protects the inside treasures from outside environment.

Ship's Hull

Everything that is stored and situated within the main ship structure is covered and protected by the ships hull. It includes the key parts of the ship such as bow, deck, the bottom keel and the both sides of the ship.

Various parts of Ship's Hull

They are made up of series of plates jointed together called stakes along with other structural member such as plating and stiffeners.

A stiffener consists of structural parts such as longitudinal and transverse frames, bulkhead stiffness, girders and beam. While ships plating consists mainly of deck platting along with bottom, bulkhead and side platting.

 

Hull Design

Ships hull are designed as such to offer minimum resistance to water, is feasible and economical to construct without losing on much needed cargo space. One can easily calculate and improve the overall efficiency of a ship calculating and reducing hull’s resistance to ships motion.

 

FUNCTIONS

Made of steel the key role of ships hull is to maintain its water-tight integrity and reduce water drag. And so hull plays a major role in determining the overall efficiency of a ship. Ships hull are thus coated with special paints that not only reduce frictional drag but also avoid marine growth which further increases the resistance to ships motion. Thus ships hull are cleaned and repainted with special coating during dry dock operation.